📄 symfirst.htm
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<title>symFirst -- basic</title>
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<td class=title-left><b> symFirst</b></td>
<td class=title-center><b> basic</b></td>
<td class=title-right><B> EMF</B></td>
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<h2>Synopsis</h2>
<p>Finds the first value for a given symbol table</p>
<h2>Prototype</h2>
<pre>
sym_t *<b>symFirst</b>(sym_fd_t sd);
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<h2>Parameters</h2>
<p>
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<td width=40>sd</td>
<td>Handle to the table created from a previous call to symOpen</td>
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<h2>Description</h2>
<p>
This module implements a highly efficient generic symbol table with
update and access routines. Symbols are simple character strings and
the values they take can be flexible types as defined by value_t.
This module allows multiple symbol tables to be created.
</p>
 
<p>
Return the first symbol in the hashtable if there is one. This call is used
as the first step in traversing the table. A call to symFirst should be
followed by calls to symNext to get all the rest of the entries.
</p>
<h2>Return Value</h2>
<p>
Returns a pointer to a sym_t structure which contains the value.
NULL if not found.
</p>
<h2>Example</h2>
<pre>
sym_fd_t data;
sym_t* elem;
elem = symFirst(data);
while (elem != NULL) {
ejSetVar(0, elem->name.value.string, elem->content.value.string);
elem = symNext(data);
}
</pre>
<h2>See Also</h2>
<p>
<a href="symClose.htm">symClose</a>,
<a href="symDelete.htm">symDelete</a>,
<a href="symEnter.htm">symEnter</a>,
<a href="symLookup.htm">symLookup</a>,
<a href="symNext.htm">symNext</a>,
<a href="symOpen.htm">symOpen</a>
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